Machine for making and forming grommets and the like



Sept. 28 1926. 1,601,681

w. G. CORSON MACHINE FOR MAKING AND FORMING GROMMETS AND THE LIKE Filed July 9. 1925 2 Sheets-Sheet. 1

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W. G. CORSON -MACHINE FOR MAKING AND FORMING GROMMETS AND THE LIRE 1 Filed July 9. 1925 2 Sheets-Sheet z 9 1' m M I 4 v Mam/0r [147/1010 6 Canyon llllorm y Patented Sept. 28, 1926.

LJNITED STAT. S

earner orri-cs.

WILLIAM G. CORSON, OF AKEQN, CHIC, ASSIGNOB TO THE NATIONAL STANDARD COMPANY, OF NILES, MICEIGAN, A CGRPORATION OF MICHIGAN.

MACHINE FOR Ii/IAKING AND FORMING GROMMETS AND THE LIKE.

Application filed July 9,

This invention relates to a machine for making and forming grommets or other forms of laminated rings.

An object of the invention resides in providing a machine adapted to make grommets or form rings from strip material by uniformly bending the strip material to form the ring or grommet which may contain several convolutions of the strip material in the completed article.

Another object of the invention resides in providing a machine which will produce laminated grommets or rings of any desired size with means for controlling the amount of strip material formed into each grommet in order to make all grommets of sub. tially uniform size and section.

A further object of the invention resides in providing a machine of the above mentioned character in which the controlling mechanisms are all adjustable so that the section, size, and number of convolutions in a ring may be governed within predetermined limits.

The invention comprehends other objects and improvements in the details of construction and arrangement of the parts which are more particularly pointed out in the following detailed description and in the claims directed to a preferred form of the invention, it being understood, however, that various changes may be made in the construction of the parts of the machine without departing from the scope of the invention as herein set forth.

In the drawings forming part of this application Fig. 1 is a plan view of the improved machine,

Fig. 2 is a sectional View taken on line 2--2 of Fig. 1, v

Fig. 3 is a sectional view taken on line 33 of Fig. 1

Fig.4 is an and Fig. 5 is a disassembled perspective view of one of the bending rollers. v

1 indicates a table suitably supported on uprights 2 on the upper face of which is mounted a plurality of flanged rollers 8, 4 and '5. respectively. The flanges of the rollers are provided with gear teeth intermeshing with the gear teeth of one of'the other rollers as indicated at 6. The table is formed with an .arouate slot 7 concentric end elevation of the machine,

1925. Serial No. 42,618.

with the axis of rotation of roller 4 so that the roller 5 may be adjusted relative to rollers 3 and 4 for purposes hereinafter set forth. A U-shape adjusting member 8 forms a bearing member for the roller '5 for adjusting the roller in the slot through the operation of the adjusting screw 9 threaded in the bridge portion of the member 8 and journaled in the lug 10 on the table. A shaft 11 is journaled in the table at the upper end and in the bearing 12 at the lower end and is provided with a drive gear 13 meshing with the teeth on roller 3 for driving all of the rollers in the rotation of the shaft. A friction disk 14 is mounted on the shaft 11 adjacent the lower end and with which engages the friction roller 15 mounted on the drive shaft 16 of the motor 17, The end of this drive shaft 16 is journaled in the bearing block 18 also rotatably receiving the. shaft 11.

A strip of material 19 to be formed is received between roller 4 and rollers 3 and 5, as shown in Fig. 1, and in the rotation of the rollers by the motor through the mechanism above described the strip will be drawn through the rollers and simultaneously bent to the curvature of the desired size of ring according to the set of roller 5 relative to the other rollers.

As the strip leaves the rollers it is dis blocks 27 carried by the bottom side of the table. The conveyor belt 26 passes over the drive roller 28 journaled in bearings 29 and which is driven by the belt 30 from the pulley 31 on shaft 11 passing over pulley 32 carried by the roller shaft 83. I

In the making of a ring 25 with this machine several turns or convolutions of the strip are formed and built one upon the other as illustrated. For constructing rings of uniform size and section a gauging mechanism is provided for controlling the operation of suitable cutting mechanism for severing the strip and to complete the formation of the ring. This gauging mechanism includes a gauging roller 34- rotatable in the bracket 35 carried by the arm 36. The arm 36 is pivotally mounted on the table at 87 and at the other end is provided with an ad justable pivot connection 38 with the clutch operating lever 39, pivotally mounted intermediate the ends at 10 on the shaft carrying bracket 41. A shaft 42 is rotatable in the bearings oi the bracket ell on which is freely and rotatably mounted the cutter and ring operating cam member 13 which. has clutch member of suitable form at M. A sliding collar 45 carries a cooperating clutch member of suitable form at 46 and is slidably mounted on shaft 1-2 for rotation therewith, the spring 47 normally retaining collar is and its carried clutch member 46 in disengaged relation with respect to clutch member 14.

A stationary cutter plate 16 is mounted on the table 1 with which cooperates the movable cutter bar 19 carried by the cutter bar operating lever 50 pivotally mounted on the table intermediate its ends and having a depending extension 51 engaging the surface of the cutter operating cam 52 0t cam member e3. A coil spring 53 normally tensioned is connected to the end of lever 50 and the.

table and normally holds the cutter bar operating lever in raised position. A coil spring 54: operates lever 36 for normally retaining the roller 34 in engagement with the top coil of the ring 25.

The above described structure operates so that when the desired section of the ring" is built up by the coiling of the convolutions of the strip member into the ring, the roller 34 will be raised as the section of the ring is built up and at the proper time move the clutch collar 45 sufiiciently to engage clutch member L6 with clutch member 4 which will rotate the cam 52 and operate the cutter bar operating lever to operate the cutter. and sever the strip, completing the formation of a ring 25 of desired shape and section.

The shaft 12 is rotated by a suitable belt 55 trained over the pulleys 56 and 57 on the shafts 11 and 42. respectively.

The cam 58 ot' the cam member 43 operates lever 59 pivotally mounted under table 1 and which has a pin and slot connection with the ring 23 following the operation 015 the cutter bar for rotating the ring 23 relative to the annular support 22 to move the rolls 20 to discharge the ring 25 onto the cone veyor 26. The spring 60 serves to normally hold the ring 23 and lever 59 in the position shown in Fig. 1.

The bending rolls 3, 4 and 5 each comprise specially constructed parts including the end gear sections 61 which are formed with cylindrical recesses 62 adapted to receive the bending cylinder or plug 63 with which the gear sections are adapted for assembly in adjustable relation. The set screws 6% ext-end thro gh alined openings in both the gear and the bending cylinder for securing the parts any desired position of adjustment. In providing a bending roll having adjustable parts in the manner as described it is to be noted that in the bending of various thicknesses of materials which may be used that the gear sections 61 may be adjusted on the cylinder 63 in such a manr 1' that the material bei g bent will be prevented from warping and twisting due to the fact that the opposed faces 01" the gear sections 61 may be brought into closed contact with the edges of the material being bent.

The pivot connection 88 may be adjusted for controlling the operation or the cutter bar and thereby control the number of convolutions or laininations built up in each ring within desired limits so that rings of difierent section may be made in the machine without alteration of the structure. The adjustment of screw 9 controlling the setting: of roller 5 operates to form the de sired size or diameter oi ring.

It will be seen that a machine has been produced which will eiliciently operate to term laminated rings or grommets of desired size and section.

What is claimed is 1. A machine of the class described comprising a table, a strip bending and feed ing means mounted on the table, a supporting' means mounted on the bottom of the table for receiving and supporting the bent strips, said supporting means having movable portions to permit the discharge of the bent strip, cutting means mounted on the table for cutting the strip, gauging means operable by the strip, and operating means for the cutting means controlled by the gaug- 8. A machine of the class described comprising strip bending means,strip cutting means, operating mechanism for said strip cutting means, a clutch controlling the ac tion of the operating mechanism, a clutch shitting member engaged with the bent strip and shifted thereby as the bent strip builds Hit) up under the action of the strip bending means and positive mechanical motion transmission means between the clutch shifting member and the clutch.

4. A machine of the class described comprising strip bending means, strip cutting means, operating mechanism for said strip cutting means including a shaft, a clutch controlling the drive of the shaft, means for actuating the cutting mechanism from the shaft, a clutch shifting roller engaged with the bent strip and shifted thereby as the bent strip builds up under the action of the strip bending means, and positive mechanical motion transmission means between the roller and the clutch.

5. A machine of the class described comprising strip bending means, a support for the bent strip built up by said strip bending means, said support comprisin a plurality of shiftable supporting members positionable to support the strip and also positionable to discharge the strip after the same has been bent, strip cutting means, operating mechanism including a shaft, a clutch controlling the drive or" the shaft, means for actuating the cutting mechanism from the shaft, means for shifting the shiitable supporting members from the shaft, a clutch shifting member engaged with thebent strip as it is built up on the support under the action of the strip bending means and motion transmission means between the clutch shifting member and the clutch.

6. A machine of the class described comprising strip bending means and a support for the bent strip built up under the action of the strip bending means and including a plurality of shiftable supporting members positionable to support the strip during the bending operation and also positionable to discharge the strip after it has been completely bent and formed. I

7. A machine of the class described comprising strip bending means, a support for the bent strip formed by the action of the strip bending means and including a plurality of: shiitable supporting members positionable to support the strip during the bending operation, cutting means for the strip, and automatic means for shifting the shiftable supporting members in synchronism with the operation of the cutting means.

8. A machine of the class described comprising strip bending means, a support for the bent strip formed by said means and comprising a plurality of shiitable supporting members positionable to support the strip during the bending operation and also positionable to discharge the strip after the same has been bent, operating mechanism including a shaft, a clutch controlling the drive of the shaft, means for shifting the supporting members from the shaft, a clutch shitting member engaged with the bent strip as it is formed on the support and motion transmission means between the clutch shifting member and the clutch.

9. A. machine of the class described com-- prising strip bending means, a support for the bent strip formed by said means comprising a fixed ring, a plurality of supporting rollers pivoted on said ring and a shifting ring having pin and slot connections with said rollers.

In testimony whereof I hereunto afliX my signature.

WILLIAM G. COR-SON. 

